Paint-remover.



- WALTER maximum, or NEW Your, N. Y.

orrrois.

' V rarurnnmovna,

No Drawing.

To all whom it may concern."

' Be it known thatI, WALTER ALEXANDER, a citizen of the United States of America, and a resident of the city of New York, State of New York, borough of .Manhattan, have invented certain new and useful Improvemen'ts in Paint-Removers, of which the following is an exact description.

Hitherto two classes of paint removers have been generally employed. The older class of. removers contained alkaline agents and other powerful chemicals, which caused injury both to the operator and to the masolvents in contact with the surfaces to be treated so long that the removal of paint,

- varnish, lac or the iike is accomplished most 'ormationof the'skin in thoroughly. The my new compound is brought about by the employment of a solution of a cellulose ester, such as nitro cellulose. or acetylcellulose in a suitable organic solvent," such as acetone or what is commercially known as methylacetor e, mixed with water.

As such a solution of a cellulose ester in organic solution leaves behind a hard skin or film' upon evaporation of the solvent, I

prevent this-hard drying'by the addition of water, or preferably, an aqueous solution of a carbohydrate such as glucose. To these two solutions, that of the. cellulose esters in an organic solvent and that of the carbohydrate in water, I may add other materials which have been hitherto generally employed as paint and varnish removers; and for the water or, the aqueous-solution of a carbohydrate I may substitute ,benzol, which although precipitating nitro cellulose does not interfere, with formation of the skin in my new remover. Water-may then again be added after the benzol, and the mixture thus obtained still retains its usefulness as a 'skinforming remover.

In carrying out my invention practically,

specification of Letters Patent. Application filed February 23, 1am. Serial Ito/545,265.

Patented June22, I915.

rst dissolve five parts of commercial glucose in.-five parts of waterg-"to this solution I add seventy parts I proceed as follows:

of a nitro cellulose solution, made by dissolving ten parts of nitro cellulose in ninety parts of acetone; then I add twenty parts of paint solvents, for example coaltarbenzole, and finally fifteen parts of water. The thus obtained liquid is applied with a brush or' rag on the surfaces to be treated. By the skln which is quickly formed, the solvents are prevented from evaporating uselessly into the air and are forced to remain in contact with the painted surface. By this lessened evaporation and prevention of loss of solvent great economy is accomplished and great convenience in working is brought about, as the operator can take his time in applying the remover and in cleaning 0d the treated surfaces.

Although I have above described an example by which my new skin forming paint remover may be obtained, I do not wish to be understood as excluding from my claim equivalents for the ingredients or the operations employed in the process. This paint remover possesses among other features of advantage the applicability alike to the removal'either of oil or water paints, or both, where one overlies the other, or to the removal of varnish or lacquer. Substitutes may be. employed without departing from lthe scope and purpose of the process intended to be secured hereby.

I claim:

I l. A new skin-forming paint remover for both oil and water paints comprising a solution of a cellulose ester in a suitable organic solvent, said solution being of film-forming consistency, an aqueous liquid emulsified therewith and organic paint solvents, said cellulose ester solution remaining of filmforming consistency, and the skin-forming properties of the paint remover being due to said film-forming solution. j

2. A new skin-forming paint remover for both oil and water paints comprising about 70 parts of a solution of 1 part of nitrocellu lose in about 9 parts of a suitable organic solvent, about 25 parts of an aqueous liquid, and about 20 parts'of an organic paint solvent. P

3. A new skin-forming paint remover for both oil and water paints comprising a mixture of the comprising a cellulose ester dissolved in a.

dissolved in 5 parts water, 70 parts of a a nitrocellulose solution madeflby dissolving 10 parts ni-troc ellulose in 90 parts of acetone,

20 parts of coaltar benzene and15 partsof water.

l The new skin forming paint remover suitable organic solvent, a carbohydrate dissolved in Water; and organic paint solvents.

The new skin forming paint remover comprising solved in water, and organic" paint solvents. 6. The new skin forming paint remover comprising a cellulose ester dissolved in a nitro cellulose dissolved in a suitable organic solvent, a carbohydrate dis- WALTER ALEXANDER. Witnesses ELIZABETH J. VAIL,

SEWARD DAVIS. 

